Drive system for a self-propelled harvesting machine

Abstract

A drive system for a self-propelled harvesting machine includes a drive engine, designed as an internal combustion engine, a transfer gearbox driven by the drive engine that includes a first driven pulley which is disposed on a drive shaft for driving at least one drive pulley of a working mechanism using a first belt, and at least one hydraulic pump for driving a further working mechanism. A second output pulley is assigned to the transfer gearbox and drives the at least one hydraulic pump using a second belt.

What is claimed is: 
     
       1. A drive system for a self-propelled harvesting machine, comprising:
 a drive engine designed as an internal combustion engine; 
 a transfer gearbox that is driven by the drive engine; and 
 a first and a second hydraulic pump; 
 a main drive train that comprises mechanically driven working mechanisms; and 
 an auxiliary drive train that comprises hydraulically driven working mechanisms; 
 wherein the transfer gearbox comprises a first driven pulley, that is disposed on a drive shaft and that directly drives the mechanically driven working mechanisms of the main drive train by a first belt, and a second driven pulley that is drivably connected to the first hydraulic pump and the second hydraulic pump by a second belt, and 
 wherein the first hydraulic pump drives a first one of the hydraulically working mechanisms and the second hydraulic pump drives a second one of the hydraulically driven working mechanisms. 
 
     
     
       2. The drive system according to  claim 1 , wherein the second driven pulley is disposed parallel to the first driven pulley. 
     
     
       3. The drive system according to  claim 1 , wherein the first hydraulic pump and the second hydraulic pump of the auxiliary drive train are designed as a tandem pump and wherein the tandem pump is driven by a common first pump drive pulley by the second belt. 
     
     
       4. A forage harvester comprising a drive system according to  claim 1 . 
     
     
       5. The drive system according to  claim 1 , wherein the first one of the hydraulic working mechanisms of the auxiliary drive train is a front attachment and the second one of the hydraulic working mechanisms of the auxiliary drive train is an intake conveyor mechanism. 
     
     
       6. The drive system according to  claim 5 , wherein the second belt drives a second pump drive pulley for driving a third hydraulic pump that is used to drive a hydraulic pick-up drive of the front attachment, and wherein the front attachment is designed as a pick-up. 
     
     
       7. The drive system according to  claim 6 , wherein the second pump drive pulley is engaged using a clutch. 
     
     
       8. The drive system according to  claim 7 , wherein the first hydraulic pump, the second hydraulic pump and the third hydraulic pump are disposed on a common support.